Having annotated some of my better games here, it's probably high time to show a not-so good game. Before I provide the actual moves, let me show some snapshots from throughout the game.
After Black's eleventh move; White is slightly better.
After White's seventeenth move; Black is slightly better.
After Black's twenty-second move; Black is winning.
Okay, so what exactly happened here? In a matter of eleven moves I went from a comfortably better to lost.
1.e4 c5 2.Nf3 d6 3.Bb5+ Nd7 4.0-0 Ngf6 5.Re1 a6 6.Bf1 g6 7.c3 Bg7 8.d4 cxd4 9.cxd4 0-0 10.a4 b6 11.Nc3 Bb7